TgO Lev14:51 :וְיִטבוֹל יָתְהוֹן בִדמָא דְצִיפְרָא‏ : he should dip them in the goat's blood
See the entire entry for ṭbl vb. to dip

TgO Lev14:51 :צִיפְרָא דִנכִיסְתָא‏ :
See the entire entry for nḵī/ēsā, nḵī/ēstā n.f. sacrifice